package com.zzw.utils;

public class IPUtil {


    public static boolean ipExistsInRange(String ip,String ipSection) {
        ipSection = ipSection.trim();
        ip = ip.trim();
        int idx = ipSection.indexOf('-');
        String beginIP = ipSection.substring(0, idx);
        String endIP = ipSection.substring(idx + 1);
        return getIp2long2(beginIP)<=getIp2long2(ip) &&getIp2long2(ip)<=getIp2long2(endIP);
    }

    public static long getIp2long(String ip) {
        ip = ip.trim();
        String[] ips = ip.split("\\.");
        long ip2long = 0L;
        for (int i = 0; i < 4; ++i) {
            ip2long = ip2long << 8 | Integer.parseInt(ips[i]);
        }
        return ip2long;
    }

    public static long getIp2long2(String ip) {
        ip = ip.trim();
        String[] ips = ip.split("\\.");
        long ip1 = Integer.parseInt(ips[0]);
        long ip2 = Integer.parseInt(ips[1]);
        long ip3 = Integer.parseInt(ips[2]);
        long ip4 = Integer.parseInt(ips[3]);
        long ip2long =1L* ip1 * 256 * 256 * 256 + ip2 * 256 * 256 + ip3 * 256 + ip4;
        return ip2long;
    }

    public static void main(String[] args){
        String ip="192.168.10.9";
        String ipSection="192.168.10.10-255.255.255.255";
        boolean exists=ipExistsInRange(ip,ipSection);
        System.out.println(exists);
    }
}
